ABLS-4.000MHz-B4H-T
Overview
The ABLS-4.000MHz-B4H-T is a surface-mount quartz crystal oscillator designed for precise timing applications in electronic circuits. With a fundamental frequency of 4.000 MHz, this component offers excellent frequency stability and low phase noise, making it suitable for a wide range of electronic devices. Quartz crystal oscillators like the ABLS-4.000MHz-B4H-T are essential components in modern electronics, providing the clock signals that synchronize operations in microcontrollers, communication systems, and other digital circuits. The B4H-T designation typically indicates specific package dimensions and performance characteristics.
Structure and Working Principle
The ABLS-4.000MHz-B4H-T consists of a quartz crystal blank mounted within a hermetically sealed ceramic package. The crystal vibrates at its natural resonant frequency when voltage is applied, creating a stable oscillating signal. This frequency is determined by the crystal's physical dimensions and cut. The oscillator includes built-in circuitry to maintain oscillation and provide a clean output signal. The ceramic base provides mechanical stability and environmental protection while allowing for surface-mount assembly. Proper circuit design must account for the specified load capacitance to ensure optimal performance.
Key Features
This oscillator offers frequency stability typically in the range of ±10 to ±50 ppm (parts per million), depending on operating conditions. The compact surface-mount design (commonly 3.2 × 2.5 × 1.0 mm) makes it suitable for space-constrained applications. Additional features include low power consumption (usually under 1 mA operating current) and fast start-up time (typically 1-5 ms). The device operates over a wide temperature range, usually -40°C to +85°C, making it suitable for industrial applications.
Application Areas
The ABLS-4.000MHz-B4H-T finds extensive use in microcontroller timing circuits, where it provides the system clock signal. It's also commonly employed in communication devices, industrial control systems, and consumer electronics such as set-top boxes and smart home devices. In automotive electronics, similar oscillators are used for CAN bus timing and infotainment systems. The 4.000 MHz frequency is particularly popular for USB full-speed devices, as it can be easily divided down to the required 12 MHz USB clock frequency.
Maintenance and Precautions
Quartz crystal oscillators are generally maintenance-free components. However, they should be protected from mechanical shock during handling and assembly, as excessive vibration can damage the crystal element. Storage conditions should avoid extreme humidity and temperatures. When soldering, follow recommended reflow profiles to prevent thermal shock. In circuit design, keep the oscillator away from heat sources and high-frequency noise generators that might affect frequency stability.
B2B Procurement Guide
When sourcing the ABLS-4.000MHz-B4H-T, verify specifications including frequency tolerance, operating temperature range, and load capacitance requirements. Lead times can vary from 4-12 weeks depending on manufacturer and quantity. Consider purchasing from authorized distributors to ensure genuine components. For large volume orders (typically 10,000+ units), direct manufacturer pricing may be available. Quality certifications such as ISO 9001 and AEC-Q200 (for automotive applications) may be important selection criteria.